Enantioselective allylic oxidation of cycloalkenes by using Cu(II)-tris(oxazoline) complex as a catalyst
摘要:
Optically active copper(II)-tris(oxazoline) complex that was synthesized as a model compound of the active site of non-heme oxygenase, was found to catalyze allylic oxidation of cycloalkenes to give the corresponding 2-cycloalkenyl benzoates with moderate to excellent enantioselectivity (up to 93% ee) under the Kharash-Sosnovsky reaction conditions. (C) 1997 Elsevier Science Ltd.
Enantioselective allylic oxidation of cycloalkenes by using Cu(II)-tris(oxazoline) complex as a catalyst
摘要:
Optically active copper(II)-tris(oxazoline) complex that was synthesized as a model compound of the active site of non-heme oxygenase, was found to catalyze allylic oxidation of cycloalkenes to give the corresponding 2-cycloalkenyl benzoates with moderate to excellent enantioselectivity (up to 93% ee) under the Kharash-Sosnovsky reaction conditions. (C) 1997 Elsevier Science Ltd.
作者:Xin Nie、Chen‐Xi Ye、Sergei I. Ivlev、Eric Meggers
DOI:10.1002/anie.202211971
日期:2022.11.25
A new strategy for the synthesis of non-racemic cycliccarbonates from abundant alcohol feedstocks is presented. The method exploits an unusual nitrene-mediated C−H oxygenation via a proposed 1,7-hydrogen atom transfer (HAT).
Chemical Synthesis and Biological Evaluation of C-2 Taxoids
作者:K. C. Nicolaou、J. Renaud、P. G. Nantermet、E. A. Couladouros、R. K. Guy、W. Wrasidlo
DOI:10.1021/ja00114a005
日期:1995.3
An efficient, general method for the synthesis of 1,2-hydroxy esters by regioselective nucleophilic opening of 1,2-cyclic carbonate systems has been developed. A reliable and practical route giving access to the taxoid carbonate 2 from the readily available 10-deacetylbaccatin III (13) has been established. Nucleophilic opening of the carbonate 2 with a variety of nucleophiles provided a number of novel C-2 Taxols. Water-soluble taxoid onium salts (e.g., 31e, 31n, 32, and 34b) were also synthesized and studied. A selected number of taxoids were subjected to cytotoxicity and tubulin polymerization assays as well as in vivo studies. The results of these studies are reported herein.
Nicolaou, Kyriacos Costa; Couladouros, E. A.; Nantermet, P. G., Angewandte Chemie, 1994, vol. 106, # 15/16, p. 1669 - 1671
作者:Nicolaou, Kyriacos Costa、Couladouros, E. A.、Nantermet, P. G.、Renaud, J.、Guy, Rodney Kiplin、Wrasidlo, Wolfgang